CVE-2021-40346
Scores
EPSS
Percentile: 92.3%
CVSS
CVSS Score: 7.5/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
None (N)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
None (N)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
None (N)
Measures the impact to the confidentiality of information
Integrity Impact
Partial
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
None (N)
Measures the impact to the availability of the impacted component
Description
An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.
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Sources
CWEs
Related Vulnerabilities
Exploits
Exploit ID: CVE-2021-40346
Source: github-poc
Vulnerable Software (20)
Type: Configuration
Product: haproxy
Operating System: ubuntu trusty 14.04
{
"unfixed": true
}Source: ubuntu
Type: Configuration
Product: haproxy
Operating System: debian stretch 9
{
"unaffected": true
}Source: debian
Type: Configuration
Product: haproxy
Operating System: debian buster 10
{
"unaffected": true
}Source: debian
Type: Configuration
Product: haproxy
Operating System: debian
{
"fixed": "2.2.16-3"
}Source: debian
Type: Configuration
Product: haproxy
Operating System: rhel
{
"fixed": "2.2.15-2.el8"
}Source: redhat
Type: Configuration
Product: haproxy
Operating System: rhel
{
"fixed": "2.2.13-2.el7"
}Source: redhat
Type: Configuration
Product: haproxy
Operating System: rhel
{
"fixed": "2.0.19-2.el7"
}Source: redhat
Type: Configuration
Product: haproxy
Operating System: rhel
{
"fixed": "2.0.16-4.el8"
}Source: redhat
Type: Configuration
Product: haproxy
Operating System: ubuntu xenial 16.04
{
"unfixed": true
}Source: ubuntu
Type: Configuration
Product: haproxy
Operating System: astra 4.7.3.5
{
"unaffected": true
}Source: astra
Type: Configuration
Product: haproxy
Operating System: ubuntu jammy 22.04
{
"fixed": "2.2.9-2ubuntu2"
}Source: ubuntu
Type: Configuration
Product: haproxy
Operating System: ubuntu impish 21.10
{
"fixed": "2.2.9-2ubuntu2"
}Source: ubuntu
Type: Configuration
Product: haproxy
Operating System: ubuntu hirsute 21.04
{
"fixed": "2.2.9-1ubuntu0.2"
}Source: ubuntu
Type: Configuration
Product: haproxy
Operating System: ubuntu focal 20.04
{
"fixed": "2.0.13-2ubuntu0.3"
}Source: ubuntu
Type: Configuration
Product: haproxy
Operating System: ubuntu bionic 18.04
{
"unaffected": true
}Source: ubuntu
Type: Configuration
Product: haproxy
Operating System: astra 1.7.3.7
{
"unaffected": true
}Source: astra
Type: Configuration
Product: haproxy
Operating System: astra 1.6.12
{
"unaffected": true
}Source: astra
Type: Configuration
Vendor: debian
Product: debian_linux
Operating System: * * *
{
"cpe_match": [
{
"cpe23uri": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"vulnerable": true
}
],
"operator": "OR"
}Source: nvd
Type: Configuration
Vendor: fedoraproject
Product: fedora
Operating System: * * *
{
"cpe_match": [
{
"cpe23uri": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",...{
"cpe_match": [
{
"cpe23uri": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"vulnerable": true
}
],
"operator": "OR"
}Source: nvd
Type: Configuration
Vendor: haproxy
Product: haproxy
Operating System: * * *
{
"cpe_match": [
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.25",
"versionStartIncluding": "2.0.0",
"vulnerable": true
},
...{
"cpe_match": [
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.25",
"versionStartIncluding": "2.0.0",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.2.17",
"versionStartIncluding": "2.2.0",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.3.14",
"versionStartIncluding": "2.3.0",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.4.4",
"versionStartIncluding": "2.4.0",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:2.5:dev0:*:*:*:*:*:*",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:2.5:dev1:*:*:*:*:*:*",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:2.5:dev2:*:*:*:*:*:*",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:2.5:dev3:*:*:*:*:*:*",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:2.5:dev4:*:*:*:*:*:*",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:2.5:dev5:*:*:*:*:*:*",
"vulnerable": true
},
{
"cpe23uri": "cpe:2.3:a:haproxy:haproxy:2.5:dev6:*:*:*:*:*:*",
"vulnerable": true
}
],
"operator": "OR"
}Source: nvd